CN214889117U - Wet explosion-proof balanced valve of accuse - Google Patents

Abstract

The utility model discloses a wet explosion-proof balanced valve of accuse, it includes the valve body, wear to locate the guide arm in the valve body, locate the spring between valve body and the guide arm, be fixed in guide arm tip's piston, be equipped with the bleeder vent that corresponds with the ventilative centre bore of guide arm on the piston, the waterproof ventilated membrane of installation covers the bleeder vent on the piston, the guide arm is equipped with the wet subassembly of level pressure accuse in ventilative centre bore lower extreme, the wet subassembly of level pressure accuse is including sealed the pad and the sealed lid that are used for cooperating the ventilative centre bore of shutoff, locate the last spring between sealed lid upper end and the guide arm, locate the backing sheet of sealed terminal surface down, be fixed in lower blanking cover of ventilative centre bore lower extreme, install the lower spring between blanking cover and the backing sheet down, lower blanking cover has central hole site. The utility model discloses the level pressure accuse wet subassembly of addding can be in the external moisture of separation enters into the seal box under normal condition, effectively solves the inside humidity of seal box too high, the dewfall problem, makes the utility model discloses collect explosion-proof, waterproof ventilative, accuse wet etc. multi-functionally as an organic whole.

Description

Wet explosion-proof balanced valve of accuse

The technical field is as follows:

the utility model relates to an explosion-proof valve technical field refers in particular to a wet explosion-proof balanced valve of accuse.

Background art:

with the rapid increase of the electric automobile holding capacity in China, the frequent occurrence of fire and combustion accidents of electric automobiles, and the safety problem of the electric automobiles is always the key point of attention of consumers. Therefore, a series of mandatory national standards are newly issued by related departments, wherein the safety requirements of electric automobiles on electrical safety and function are mainly stipulated in the safety requirements of electric automobiles, and the requirements of waterproof, insulation resistance and monitoring of the whole automobiles are strengthened so as to reduce the safety risk of the vehicles under the conditions of normal use, wading and the like; aiming at the release and implementation of the mandatory national standards, higher requirements are put forward on the waterproof, ventilation, moisture resistance and the like of the new energy automobile power system.

The core components in the power system of the electric automobile, such as a battery PACK, an electric controller, a motor and the like, are safe and reliable. In order to ensure the safe and stable work, the power battery needs to be waterproof and dustproof, namely, a sealing state is theoretically needed, however, in the sealing state, once the power battery is in short circuit and is out of control thermally, a large amount of high-temperature mixed gas containing solid or colloidal substances can be generated, and if the high-temperature mixed gas cannot be discharged in time, severe fire and explosion can occur under the common conditions, so that serious casualties and property loss are caused. Therefore, in the prior art, a waterproof breathable explosion-proof balance valve (commonly called an explosion-proof valve) is arranged on a battery pack box body to meet the waterproof and explosion-proof requirements of a power battery system.

The waterproof breathable microporous membrane is installed inside the waterproof breathable valve and the explosion-proof valve in the prior art, liquid water can be prevented from entering the box body, but moisture in the air cannot enter the sealing cavity, and condensation can be generated under the environment with humidity difference change after a large amount of moisture enters, so that the risk of short circuit caused by reduction of insulation resistance is reduced, and therefore the requirements of new national standards on water resistance and insulation cannot be met.

The existing solution is to place desiccant, moisture-absorbing film/paper and other methods in the box, and such absorbent materials will lose their performance and need to be replaced frequently after moisture absorption reaches saturation. Therefore, the existing technical scheme needs further solution and optimization.

The utility model has the following contents:

an object of the utility model is to overcome prior art not enough, provide a wet explosion-proof balanced valve of accuse.

In order to solve the technical problem, the utility model discloses a following technical scheme: this wet explosion-proof balanced valve of accuse includes: the valve comprises a valve body, a guide rod which penetrates through the valve body and can slide, a spring arranged between the valve body and the guide rod, and a piston which is fixed at the end part of the guide rod and blocks the valve body, wherein the guide rod is provided with a through ventilation center hole, the piston is provided with a ventilation hole corresponding to the ventilation center hole, a waterproof ventilation film arranged on the piston covers the ventilation hole, the guide rod is provided with a constant-pressure humidity control assembly at the lower end of the ventilation center hole, the constant-pressure humidity control assembly comprises a sealing gasket and a sealing cover which are used for matching with the ventilation center hole to block the ventilation center hole, an upper spring arranged between the upper end of the sealing cover and the guide rod, a supporting sheet arranged at the lower end face of the sealing gasket, a lower blocking cover fixed at the lower end of the ventilation center hole, and a lower spring arranged between the lower blocking cover and the supporting sheet, and the lower blocking cover is provided with a through center hole.

Further, in the above technical solution, a convex ring body is formed on the lower end surface of the sealing cover, and the convex ring body contacts with the upper end surface of the sealing pad; and the sealing cover is in sealing contact with the sealing gasket under the elastic force of the upper spring.

Furthermore, in the above technical scheme, a convex seat is formed at the upper end of the sealing cover, the lower end of the upper spring is sleeved on the periphery of the convex seat, and the upper end of the upper spring abuts against a first step arranged on the inner wall of the ventilation central hole.

Furthermore, in the above technical solution, a convex pillar is further formed at the center of the lower end of the sealing cover, and the convex pillar penetrates through the first central hole of the sealing gasket and the second central hole of the supporting sheet.

Further, in the above technical solution, the sealing gasket is ring-shaped and is integrally formed with silica gel or rubber or silicone rubber; the supporting sheet is an annular metal sheet, and the shape of the supporting sheet is the same as that of the sealing gasket.

Further, in the above technical solution, the lower end of the ventilation center hole is provided with a first step, a second step, a third step and a fourth step which are connected in sequence; the sealing gasket can be abutted against the third step, and the lower plug cover is clamped and fixed in the fourth step; the lower plug cover is in an inverted T shape.

Further, among the above-mentioned technical scheme, be provided with the ladder groove of intercommunication bleeder vent on the piston, waterproof ventilated membrane sets up in this ladder groove, and this ladder inslot still is fixed with solid fixed ring, and this solid fixed ring pushes down waterproof ventilated membrane outside edge.

Further, in the above technical solution, the piston is further provided with an upper cover, and the upper cover is disposed above the fixing ring and covers the waterproof breathable film.

Furthermore, in the above technical solution, the middle part of the valve body is provided with a through central through hole and a plurality of exhaust holes located outside the central through hole; the guide rod penetrates through the central through hole, and the piston can block the exhaust hole.

Further, in the above technical scheme, the upper end and the lower end of the valve body are respectively provided with a first ring groove and a second ring groove, an inner sealing ring and an outer sealing ring are installed in the first ring groove and the second ring groove, and the inner sealing ring is in contact with the piston.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect:

1. the utility model discloses set up the wet subassembly of level pressure accuse, can effectively solve the inside humidity of seal box too high, the dewfall problem of seal box in the external moisture of separation can enter into the seal box under normal condition through this wet subassembly of level pressure accuse to see through waterproof ventilated membrane and realize waterproof ventilation function, still cooperate the wet subassembly of level pressure accuse with balanced seal box inside and outside atmospheric pressure, can avoid the piston to frequently open, improve product life, make the utility model discloses collect explosion-proof, waterproof ventilative, accuse are multi-functional as an organic whole such as wet to have extremely strong market competition.

2. The utility model discloses the product is small, and the installation is used and is taken sealed box inner space few, to can effectively improving the internal volume utilization ratio of sealed box, is favorable to the miniaturized, the lightweight design of driving system.

3. The utility model discloses product simple structure, processing, equipment production are convenient, increase the wet function of accuse on explosion-proof ventilation function's basis, and the cost increases lowly after the function upgrading, is convenient for batch production and uses widely.

4. The utility model discloses can hinder wet for sealed box, prevent or reduce the dewfall, especially electric motor car battery package hinders wet, prevents that insulation level reduces, the short circuit problem provides a brand-new scheme, compares with current explosion-proof valve technique, and use cost is low, can satisfy up-to-date standard requirements such as "electric automobile safety requirement", "power storage battery safety requirement for electric automobile".

Description of the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a perspective view of another perspective of the present invention;

fig. 3 is an exploded perspective view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is a perspective view of the constant pressure and humidity control assembly of the present invention;

fig. 6 is an exploded perspective view of the constant pressure humidity control module of the present invention;

fig. 7 is a cross-sectional view of the guide bar of the present invention;

fig. 8 is a use state diagram (negative pressure state) after the utility model is installed in the sealed box body;

fig. 9 is a use state diagram (positive pressure state) after the utility model is installed in the sealed box body;

fig. 10 is a use state diagram (explosion-proof state) of the present invention after being mounted on the sealed case.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Referring to fig. 1-7, a moisture control explosion-proof balance valve is disclosed, which comprises: valve body 1, wear to locate in this valve body 1 and slidable guide arm 3, set up spring 4 between this valve body 1 and guide arm 3, be fixed in 3 tip of this guide arm and shutoff valve body 1's piston 2, specifically speaking, this piston 2 distributes in both ends about valve body 1 with guide arm 3, and this piston 2 closely laminates with valve body 1 under the elastic force of spring 4 to this reaches sealed effect. In order to further improve the sealing effect, an inner sealing ring 15 is additionally arranged at the upper end of the valve body 1, when the piston 2 is tightly attached to the valve body 1, the piston 2 is pressed on the inner sealing ring 15, so that the inner sealing ring 15 is deformed, the sealing effect between the valve body 1 and the piston 2 is more ideal, and the dustproof and waterproof functions are achieved.

The middle part of the valve body 1 is provided with a through central through hole 11 and a plurality of exhaust holes 12 positioned outside the central through hole 11; under normal conditions, the piston 2 can close off the exhaust hole 12, so that sealing between the valve body 1 and the piston 2 is realized. The guide rod 3 penetrates through the central through hole 11 and can move up and down in the central through hole 11, when the guide rod 3 moves upwards, a gap is formed between the piston 2 and the valve body 1, and the exhaust hole 12 is communicated with the outside through the gap, so that exhaust and pressure relief are realized.

The upper end and the lower end of the valve body 1 are respectively provided with a first annular groove 13 and a second annular groove 14, an inner sealing ring 15 and an outer sealing ring 16 are installed in the first annular groove 13 and the second annular groove 14, wherein the inner sealing ring 15 and the outer sealing ring 16 are installed in the inner sealing ring 15 and the outer sealing ring 16 respectively in an interference fit mode, and the inner sealing ring 15 is used for being in contact with the piston 2 to achieve sealing. The outer sealing ring 16 is used to contact with the sealed box to effect sealing.

A plurality of mounting holes 17 are arranged on the outer side of the valve body 1, when the utility model is used, a corresponding number of threaded holes are arranged on the sealing box body 100, and bolts are selected to pass through the mounting holes 17 to be fixed in the threaded holes in a spiral manner, so that the utility model is fixed on the sealing box body; or be equipped with a plurality of screw holes in the outside of valve body 1, establish corresponding quantity's through-hole simultaneously on sealed box, choose for use the bolt handle the utility model discloses fixed mounting is on sealed box 100.

The guide rod 3 is provided with a through air-permeable central hole 31, the piston 2 is provided with an air-permeable hole 21 corresponding to the air-permeable central hole 31, and the air-permeable waterproof film 5 arranged on the piston 2 covers the air-permeable hole 21. Particularly, be provided with the ladder groove 22 of intercommunication bleeder vent 21 on the piston 2, waterproof ventilated membrane 5 sets up in this ladder groove 22, and still is fixed with solid fixed ring 51 in this ladder groove 22, and this solid fixed ring 51 pushes down waterproof ventilated membrane 5 outer fringe, guarantees that waterproof ventilated membrane 5 is stably installed on this piston 2. The air hole 21 arranged in the center of the piston 2 corresponds to the air hole center 31 of the guide rod 3 to form an air passage, the waterproof air-permeable membrane 5 covers the air passage, and air can be ventilated through the air passage and the air-permeable membrane to balance the pressure difference inside and outside the sealed box body, and the piston can be prevented from being opened frequently.

The upper end of a ventilation center hole 31 of the guide rod 3 is provided with an internal thread 30, the lower end of the piston 2 is provided with a thread section, and the thread section is spirally fixed with the internal thread of the ventilation center hole 31, so that the guide rod 3 and the piston 2 are fixedly connected together.

The piston 2 is further provided with an upper cover 7, the upper cover 7 is arranged above the fixing ring 51 and covers the waterproof breathable film 5, the upper cover plays a role in protecting the waterproof breathable film 5, the waterproof breathable film 5 can be effectively prevented from being damaged, and the service life of the product is prolonged.

Referring to fig. 5-6, the guide rod 3 is provided with a constant pressure humidity control assembly 6 at the lower end of the air-permeable central hole 31, the constant pressure humidity control assembly 6 includes a sealing gasket 61 and a sealing gasket 62 for sealing the air-permeable central hole 31 in a matching manner, an upper spring 63 disposed between the upper end of the sealing gasket 62 and the guide rod 3, a support sheet 64 disposed on the lower end surface of the sealing gasket 61, a lower sealing cover 65 fixed at the lower end of the air-permeable central hole 31, and a lower spring 66 mounted between the lower sealing cover 65 and the support sheet 64, wherein the lower sealing cover 65 has a through central hole site 651. When in use, the utility model is arranged on the sealing box body and is in sealing contact with the sealing box body through the outer sealing ring; when a pressure difference exists between the inside and the outside of the sealed box body, the gas pushes the sealing cover 62 or the sealing gasket 61 through the central hole 651 of the lower blocking cover 65, and then passes through the ventilation central hole 31, the ventilation holes 21 of the piston 2 and the waterproof ventilation film 5 for ventilation, so that the pressure difference between the inside and the outside of the sealed box body 100 is balanced, and the piston is prevented from being frequently opened, as shown in fig. 8. Furthermore, the elastic force values of the upper spring 63 and the lower spring 66 in the constant-pressure humidity control assembly 6 are adjusted to control the sealing gasket 61 or the sealing cover 62 to open under the designed pressure, so that the moisture is prevented or reduced from entering the sealing box 100 through the air-permeable central hole 31 of the guide rod 3, as shown in fig. 9, the humidity control purpose is realized, that is, the external moisture can be prevented from entering the sealing box under the normal state, and the problems of overhigh humidity and dewing in the interior of the sealing box are effectively prevented. When gas pressure is greater than in the sealed box 100 the utility model discloses an during explosion-proof pressure, form the clearance between piston 2 and the valve body 1, piston 2 and the separation of inner seal circle, quick pressure release is discharged, plays explosion-proof function, as shown in fig. 10.

A convex ring body 621 is formed on the lower end surface of the sealing cover 62, and the convex ring body 621 is in contact with the upper end surface of the sealing gasket 61; and the sealing cap 62 is brought into sealing contact with the packing 61 by the elastic force of the upper spring 63, whereby the sealing effect between the sealing cap 62 and the packing 61 can be further improved.

The upper end of the sealing cover 62 is formed with a boss 622, the lower end of the upper spring 63 is sleeved on the periphery of the boss 622, and the upper end of the upper spring 63 abuts against the first step 311 arranged on the inner wall of the ventilation center hole 31, so that the assembly structure is simple.

A convex column 623 is further formed at the center of the lower end of the sealing cover 62, and the convex column 623 penetrates through the first central hole 611 of the sealing gasket 61 and the second central hole 641 of the supporting plate 64.

The sealing gasket 61 is annular and is integrally formed by silica gel, rubber or silicon rubber, and of course, the sealing gasket 61 can also be made of a soft sealing material, which is not described one by one; the support plate 64 is an annular metal sheet, and has the same shape as the seal gasket 61. The support plate 64 may be made of metal stamping or laser cutting, and is used to support the sealing gasket without deformation during operation, so as to ensure the sealing performance of the sealing gasket 61.

A first step 311, a second step 312, a third step 313 and a fourth step 314 which are connected in sequence are arranged at the lower end of the air-permeable central hole 31; the sealing gasket 61 can abut against the third step 313, and the lower blocking cover 65 is fixed in the fourth step 314 in a clamping manner; the lower blocking cover 65 is in an inverted T shape.

To sum up, the utility model discloses set up the wet subassembly of level pressure accuse, can effectively solve the inside humidity of seal box too high, the dewfall problem through this wet subassembly of level pressure accuse in the external moisture of separation enters into the seal box under normal condition to see through waterproof ventilated membrane and realize waterproof ventilation function, still cooperate the wet subassembly of level pressure accuse with balanced seal box internal and external atmospheric pressure, can avoid the piston to frequently open, improve product life, make the utility model discloses collect explosion-proof, waterproof ventilative, accuse wet etc. multi-functional as an organic whole to have extremely strong market competition. 2. The utility model discloses the product is small, and the installation is used and is taken sealed box inner space few, to can effectively improving the internal volume utilization ratio of sealed box, is favorable to the miniaturized, the lightweight design of driving system. 3. The utility model discloses product simple structure, processing, equipment production are convenient, increase the wet function of accuse on explosion-proof ventilation function's basis, and the cost increases lowly after the function upgrading, is convenient for batch production and uses widely. 4. The utility model discloses can hinder wet prevention or reduce the dewfall for sealed box, especially electric motor car battery package hinders wet, prevents that insulation level reduces, the short circuit problem provides a brand-new scheme, compares with current explosion-proof valve technique, and use cost is low, can satisfy latest standard requirements such as "electric automobile safety requirement", "power storage battery safety requirement for electric automobile".

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. A moisture control explosion proof balanced valve comprising: valve body (1), wear to locate in this valve body (1) and slidable guide arm (3), set up spring (4) between this valve body (1) and guide arm (3), be fixed in piston (2) of this guide arm (3) tip and shutoff valve body (1), this guide arm (3) have ventilative centre bore (31) that link up, be equipped with bleeder vent (21) that correspond with this ventilative centre bore (31) on this piston (2), and waterproof ventilated membrane (5) of installation cover this bleeder vent (21) on piston (2), its characterized in that:

the guide rod (3) is provided with a constant-pressure humidity control assembly (6) at the lower end of the air-permeable center hole (31), the constant-pressure humidity control assembly (6) comprises a sealing gasket (61) and a sealing cover (62) which are used for sealing the air-permeable center hole (31) in a matching manner, an upper spring (63) arranged between the upper end of the sealing cover (62) and the guide rod (3), a supporting sheet (64) arranged on the lower end face of the sealing gasket (61), a lower blocking cover (65) fixed at the lower end of the air-permeable center hole (31), and a lower spring (66) arranged between the lower blocking cover (65) and the supporting sheet (64), wherein the lower blocking cover (65) is provided with a through center hole position (651).

2. The moisture control and explosion proof balance valve of claim 1, wherein: a convex ring body (621) is formed on the lower end face of the sealing cover (62), and the convex ring body (621) is in contact with the upper end face of the sealing gasket (61); and the seal cover (62) is brought into sealing contact with the seal gasket (61) by the elastic force of the upper spring (63).

3. The moisture control and explosion proof balance valve of claim 2, wherein: the upper end of the sealing cover (62) is formed with a convex seat (622), the lower end of the upper spring (63) is sleeved on the periphery of the convex seat (622), and the upper end of the upper spring (63) abuts against a first step (311) arranged on the inner wall of the ventilation center hole (31).

4. The moisture control and explosion proof balance valve of claim 2, wherein: the center of the lower end of the sealing cover (62) is also provided with a convex column (623), and the convex column (623) penetrates into the first central hole position (611) of the sealing gasket (61) and the second central hole position (641) of the supporting sheet (64).

5. The moisture control and explosion proof balance valve according to any one of claims 1 to 4, wherein: the sealing gasket (61) is annular and is integrally formed by silica gel or rubber or silicon rubber; the supporting sheet (64) is an annular metal sheet and has the same shape as the sealing gasket (61).

6. The moisture control and explosion proof balance valve according to any one of claims 1 to 4, wherein: the lower end of the air-permeable central hole (31) is provided with a first step (311), a second step (312), a third step (313) and a fourth step (314) which are connected in sequence; the sealing gasket (61) can abut against the third step (313), and the lower plug cover (65) is clamped and fixed in the fourth step (314); the lower blocking cover (65) is in an inverted T shape.

7. The moisture control and explosion proof balance valve according to any one of claims 1 to 4, wherein: the ladder groove (22) of intercommunication bleeder vent (21) is provided with on piston (2), waterproof ventilated membrane (5) set up in this ladder groove (22), and still be fixed with solid fixed ring (51) in this ladder groove (22), should gu fixed ring (51) push down waterproof ventilated membrane (5) outer fringe.

8. The moisture control and explosion proof balance valve of claim 7, wherein: the piston (2) is also provided with an upper cover (7), and the upper cover (7) is arranged above the fixing ring (51) and covers the waterproof breathable film (5).

9. The moisture control and explosion proof balance valve according to any one of claims 1 to 4, wherein: the middle part of the valve body (1) is provided with a through central through hole (11) and a plurality of exhaust holes (12) positioned at the outer side of the central through hole (11); the guide rod (3) penetrates through the central through hole (11), and the piston (2) can block the exhaust hole (12).

10. The moisture control and explosion proof balance valve according to any one of claims 1 to 4, wherein: the upper end and the lower end of the valve body (1) are respectively provided with a first annular groove (13) and a second annular groove (14), an inner sealing ring (15) and an outer sealing ring (16) are installed in the first annular groove (13) and the second annular groove (14), and the inner sealing ring (15) is in contact with the piston (2).

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